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Ōhama Saki Lighthouse

Oc White/Red 6s🇯🇵Onomichi, JPOperational

Location & Light Range

About Ōhama Saki Lighthouse

Built in 1897, the Ōhama Saki Lighthouse is a 9-meter tall cylindrical stone tower with a lantern and gallery. It stands on a promontory on the east side of Inno Shima island, north of the Innoshima Bridge. The lighthouse was first lit in 1897 and deactivated in 1910, serving as a tidal signal station before being reactivated in 1954. Its light flashes white or red every 6 seconds. The former tidal signal station building has been converted into a popular lighthouse museum, and the site is open to the public.

Why it matters: This lighthouse aids navigation through the busy waterways near the Innoshima Bridge, a significant part of the Nishi-Seto Expressway. It also functions as a museum, preserving local maritime history and drawing visitors to the region.

Light & Optic

Characteristic Signature
Oc White/Red 6s
Flash Type
Occulting
Light Color
White/Red
Interval
6s
Raw Code
Oc W R 6s
Focal Height
18m
Geographic Range
12.7NM

Construction & History

Year Built
1897

Significant events: Deactivated 1910, converted to tidal signal station, reactivated 1954, converted to popular lighthouse museum

Visiting

Open to public
Yes

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
white
Material
stone

Structure: round stone tower with lantern and gallery

Location

City
Onomichi
Country
🇯🇵Japan
Region
Hiroshima Prefecture
Sea Region
Inland Sea, on a promontory on the east side of the island of Inno Shima, just north of the Innoshima Bridge, which connects Mukai Shima to Inno Shima as part of the Nishi-Seto Expressway connecting Honshū and Shikoku
Latitude
34.3572°
Longitude
133.1728°

References & Identifiers

Nearest Port
Onomichi(0.8 km)
Admiralty No.
M5724
ARLHS No.
JPN-453
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Frequently Asked Questions

How do mariners identify Ōhama Saki Lighthouse at night?+
Ōhama Saki displays the characteristic Oc White/Red 6s. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The white/red color may indicate a specific sector or warning zone.
Which ports and harbors does Ōhama Saki Lighthouse guide vessels into?+
Ōhama Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Shigei at 1.4 NM to the WSW. Other ports served include Itozaki (1.6 NM N), Nomi (1.6 NM N), Omi (1.6 NM N), Onomichi (1.6 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ōhama Saki Lighthouse still active and maintained?+
Yes, Ōhama Saki Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
What shipping routes pass near Ōhama Saki Lighthouse?+
Ōhama Saki Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Ōhama Saki Lighthouse?+
You can track vessels near Ōhama Saki Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.